text: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
   * implied.  See the License for the specific language governing
   * permissions and limitations under the License.
   */
  
  #include <stdio.h>
  #include "avro.h"
  
  #define NUM_RECORDS 10
  
  const char  PERSON_SCHEMA[] =
  	"{"
  	"    \"type\":\"record\","
  	"    \"name\":\"Person\","
  	"    \"fields\": ["
  	"        {\"name\": \"ID\", \"type\": \"long\"},"
  	"        {\"name\": \"First\", \"type\": \"string\"},"
  	"        {\"name\": \"Last\", \"type\": \"string\"},"
  	"        {\"name\": \"Phone\", \"type\": \"string\"},"
  	"        {\"name\": \"Age\", \"type\": \"int\"}"
  	"    ]"
  	"}";
  
  const char *file = "avro_file.dat";
  
  void print_avro_value(avro_value_t *value) {
  	char *json;
  	if (!avro_value_to_json(value, 1, &json)) {
  		printf("%s\n", json);
  		free(json);
  	}
  }
  
  int read_data() {
  	int rval;
  	int records_read = 0;
  
  	avro_file_reader_t reader;
  	avro_value_iface_t *iface;
  	avro_value_t value;
  
  	avro_file_reader(file, &reader);
  	avro_schema_t schema = avro_file_reader_get_writer_schema(reader);
  
  	iface = avro_generic_class_from_schema(schema);
  	avro_generic_value_new(iface, &value);
  
  	printf("\nReading...\n");
  	while ((rval = avro_file_reader_read_value(reader, &value)) == 0) {
  		char  *json;
  
  		if (avro_value_to_json(&value, 1, &json)) {
  			printf("Error converting value to JSON: %s\n",avro_strerror());
  		} else {
  			printf("%s\n", json);
  			free(json);
  			records_read++;
  		}
  
  		avro_value_reset(&value);
  	}
  
  	avro_value_decref(&value);
  	avro_value_iface_decref(iface);
  	avro_schema_decref(schema);
  	avro_file_reader_close(reader);
  
  	if (rval != EOF || records_read != NUM_RECORDS) {
  		fprintf(stderr, "Error: %s\n", avro_strerror());
  		return EXIT_FAILURE;
  	}
  
  	return EXIT_SUCCESS;
  }
  
  int write_data() {
  	int  i;
  	avro_schema_t schema;
  	avro_schema_error_t error;
  	avro_file_writer_t writer;
  	avro_value_iface_t *iface;
  	avro_value_t value;
  
  	if (avro_schema_from_json(PERSON_SCHEMA, 0, &schema, &error)) {
  		printf ("Unable to parse schema\n");
  		return EXIT_FAILURE;
  	}
  
  	iface = avro_generic_class_from_schema(schema);
  	avro_generic_value_new(iface, &value);
  
  	if (avro_file_writer_create(file, schema, &writer)) {
  		printf ("There was an error creating file: %s\n", avro_strerror());
  		return EXIT_FAILURE;
  	}
  
  	printf("\nWriting...\n");
  	for (i = 0; i < NUM_RECORDS; i++) {
  		avro_value_t  field;
  		avro_value_get_by_name(&value, "ID", &field, NULL);
  		avro_value_set_long(&field, (int64_t) i);
  
  		avro_value_get_by_name(&value, "Age", &field, NULL);
  		avro_value_set_int(&field, i);
  
  		avro_value_get_by_name(&value, "First", &field, NULL);
  		avro_value_set_string(&field, "Firstname");
  
  		avro_value_get_by_name(&value, "Last", &field, NULL);
  		avro_value_set_string(&field, "Lastname");
  
  
  		avro_value_get_by_name(&value, "Phone", &field, NULL);
  		avro_value_set_string(&field, "1234567");
  
  		print_avro_value(&value);
  
  		avro_file_writer_append_value(writer, &value);
  
  		// Writing multiple blocks
  		avro_file_writer_close(writer);
  		avro_file_writer_open(file, &writer);
  
  		avro_value_reset(&value);
  	}
  
  	avro_file_writer_close(writer);
  	avro_value_iface_decref(iface);
  	avro_value_decref(&value);
  	avro_schema_decref(schema);
  
  	return EXIT_SUCCESS;
  }
  
  
  int main()
  {
  	int read_data_result;
  
  	if (write_data()) {
  		return EXIT_FAILURE;
  	}
  
  	read_data_result = read_data();
  	remove(file);
  
  	return read_data_result;
  }
  